粉煤灰改性处理啤酒废水的研究

以Na2CO3、CaO、HCI、H2SO4等多种试剂作改性剂对粉煤灰进行改性处理,得到改性粉煤灰,并以改性粉煤灰处理啤酒废水,研究了粉煤灰改性的最佳条件及改性粉煤灰处理啤酒废水的机理。结果表明:改性后粉煤灰的吸附混凝性能有显著的提高,啤酒废水中COD的去除率从50%增加到89%。实验确定Na2CO3为最佳改性剂,最佳改性条件为改性剂与粉煤灰的用量比为10mL:5g,室温下搅拌5min,静置30min。     

改性稻草吸附铜离子的热力学研究

研究表明稻草改性后吸附铜离子的能力得到很大提高。在4种温度下（15、27、37、50℃）,改性稻草吸附铜离子的最大吸附量分别为1．10、1．24、1．34、1．50mmol／g。不同温度下,吸附自由能△G大大小于零,吸附过程具有强烈的自发趋势。吸附焙△H和吸附熵△S都大于零,吸附过程是熵增加推动的。     

反应柱充填活性炭法处理轧钢含铬废水的研究

针对轧钢含铬废水,分别采用活性炭和离子交换树脂吸附处理的方法对其中的Cr^6＋和Cr^3＋的去除效果进行了系统的研究。静态试验考查了pH、吸附剂用量和搅拌速度等因素的影响,同时使用微型反应柱集成装置对穿透时间、吸附容量及活性炭再生方法进行了探讨,动态试验表明反应柱充填活性炭法能有效地处理含铬废水。     

高COD浓度污水与洁净底泥作用的实验研究

通过底泥吸附和污水有机物降解实验 ,研究了高COD浓度污水与洁净底泥的相互作用。结果表明 ,洁净底泥对高COD浓度污水中的污染物具有吸附作用 ,且在起始段此作用较明显 ,但在后期的作用就下降很多。底泥固相量的增加可显著提高水相有机污染物的吸附去除率 ;但对于不同来源的污水 ,并非按照同一比例增加 ,污水性质显著影响底泥的有机污染物吸附量。污水中的有机污染物的生物降解由于其作用缓慢 ,在开始的阶段 ,对水相有机污染物的减少远没有底泥吸附所起的作用大 ;但在后期其累计的作用将明显显现出来     

EWP高效污水净化器用于重金属污水治理的试验

电池生产过程排放的污水含汞、锌、锰等重金属污染物和COD等有机污染物。该试验通过调节污水的pH值(7.5～8.5),利用进入EWP高效污水净化器的污水自身生成的Zn(OH)₂絮凝沉淀物形成的吸附过滤流化床对污水进行净化。试验结果表明可达到:出水的汞为0.000 92 mg/L,去除率为96.2%;锌去除率为99.1%;锰去除率为55.1%;COD去除率为19.6%;BOD去除率为28.3%。      

粉煤灰对染料废水的脱色研究

研究了粉煤灰对活性染料、酸性染料、直接染料、阳离子染料、硫化染料和还原染料的脱色能力,确定了脱色率为９１％－９９％时的工艺条件,用粉煤灰处理实际废水既能降低色度又能除去大量ＣＯＤ。     

土壤中铁氧化物对铅吸附-解吸的影响

选择上海地区广泛分布的水稻土,通过静态吸附平衡试验,比较土壤去除非晶质氧化铁和去除游离氧化铁后对Pb2+的吸附-解吸行为,采用数学模型拟合,探讨3种土壤的最佳拟合方程、最大吸附的理论值和亲和能力,进而研究非晶质氧化铁和游离氧化铁对Pb2+吸附-解吸的影响。结果表明,去除氧化铁后吸附能力和亲和能力均减弱,原土的最大吸附量为29.21 g/kg,非晶质氧化铁的贡献值为3.52 g/kg,游离氧化铁的贡献值为8.32 g/kg。     

Adsorption and desorption of steroid hormones on saline soil

● Organic matter content significantly affected adsorption of E2/EE2 on saline soil. ● EE2 possessed higher competition intensity for adsorption sites than E2. ● The adsorption of E2/EE2 on saline soil was a spontaneous exothermic process. ● Desorption capacity of EE2/E2 accounted for 40%/78% of the total adsorption capacity. Soil organic matter content was the main driving factor affecting adsorption and desorption process of 17β-estradiol (E2) and 17α-ethynylestradiol (EE2) on saline soil. The adsorption and desorption of E2 and EE2 on three saline soils showed the similar behavior that soil with the highest organic content possessed the highest adsorption capacity and the lowest desorption capacity for E2 and EE2. The adsorption capacity of untreated soil samples (with organic matter) was larger than that of soil samples without organic matter. For soil with the largest adsorption capacity, adsorption capacity of E2/EE2 on the untreated soil and soil colloid (with organic matter) respectively reached 0.15/0.30 μg/g and 0.16/0.33 μg/g while the soil and soil colloid without organic matter hardly adsorbed pollutants. The adsorption capacity of E2/EE2 at the initial concentration of 100 μg/L was 25/15 times higher than that at the initial concentration of 5 μg/L. E2 and EE2 had the same adsorption sites on saline soil while EE2 possessed higher competition intensity for adsorption sites than E2. Pseudo-first-order model (R² = 0.995–0.986) and Langmuir model (R² = 0.989–0.999) could better fit the adsorption process of E2 or EE2. The thermodynamic study further showed that the adsorption of E2/EE2 on saline soil was a spontaneous exothermic process. The desorption capacity of EE2/E2 accounted for 40%/78% of the total adsorption capacity to possibly exert potential risk to the groundwater. The variation of the salinity led to the variation of soil organic carbon which subsequently changed the adsorption and desorption behaviors of endocrine disrupting chemicals in coastal saline soil. This study provides a new insight on the interfacial behavior of endocrine disrupting chemicals on saline soil.